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High-temperature biaxial testing machines play an important role in the aerospace sector, being able to simulate complex mechanical and thermal environments similar to those encountered by airplanes in all phases of flight. This paper begins with an overview of the principles and development of high-temperature biaxial testing machines and then discusses their test methods as well as the testing machine's measurement system. In addition, this paper emphasizes the importance of high-temperature biaxial testing in evaluating critical aerospace components, thereby underscoring its indispensable significance in improving the reliability and safety of aircraft. Finally, this paper identifies ongoing challenges and potential avenues for future research, including expanding material adaptability, improving the accuracy of the resulting simulations, and increasing testing capabilities under more demanding conditions.
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http://dx.doi.org/10.1063/5.0235131 | DOI Listing |
J Chem Phys
September 2025
Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Campus de Cantoblanco, 28049 Madrid, Spain.
The mechanical properties of graphene are investigated using classical molecular dynamics simulations as a function of temperature T and external stress τ. The elastic response is characterized by calculating elastic constants via three complementary methods: (i) numerical derivatives of stress-strain curves, (ii) analysis of cell fluctuation correlations, and (iii) phonon dispersion analysis. Simulations were performed with two interatomic models: an empirical potential and a tight-binding electronic Hamiltonian.
View Article and Find Full Text PDFACS Omega
September 2025
Institute of Physics, University of Brasília, Brasília, Federal District 70910-900, Brazil.
The exploration of three-dimensional (3D) carbon allotropes has received increasing attention due to their potential in advanced materials and nanotechnology. Irida-Graphene (IG), a two-dimensional carbon allotrope with a structure consisting of 3-6-8 carbon rings, can be used as a precursor for creating 3D materials with tailored properties. This work presents a comprehensive computational characterization of four novel 3D structures derived from IG, named 3D-IG-α, -β, -γ, and -δ.
View Article and Find Full Text PDFJ Phys Chem B
September 2025
Beijing Engineering Research Center of Advanced Structural Transparence for the Modern Traffic System, 100095 Beijing, China.
Poly(methyl methacrylate) with biaxial stretching orientation (BO-PMMA) has superior mechanical properties compared to casting (unoriented, UO-PMMA), and is therefore widely used in the field of transparent structures. To investigate the effect of orientation on the dynamic compression properties of PMMA and establish a constitutive model applicable to BO-PMMA at different strain rates and service temperatures, this study conducted compression experiments on BO-PMMA at relatively low strain rates (1, 10, 100 s) and high strain rates (2000, 3000, 4000 s), as well as at room temperature (RT), 80 °C, and -40 °C. Through the quantitative comparison of the stress-strain curves of BO-PMMA and UO-PMMA, the influence mechanism of orientation on compressive mechanical behavior was elucidated.
View Article and Find Full Text PDFPhys Chem Chem Phys
August 2025
School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, Hunan, China.
Two-dimensional thermoelectric materials hold great promise for efficient energy harvesting and self-powered electronic devices. In this study, we systematically investigate the thermoelectric properties of BaX (X = P, As) monolayers at 300 K by combining first-principles calculations with a machine-learning-assisted four-phonon scattering framework. The results reveal that BaX monolayers overcome the conventional limitation imposed by narrow band gaps and exhibit outstanding thermoelectric performance at room temperature.
View Article and Find Full Text PDFDent Mater
August 2025
Dental Materials Science, Division of Applied Oral Sciences and Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR. Electronic address:
Objectives: To evaluate the feasibility of utilizing Digital Light Processing (DLP) 3D-printing technology to fabricate ultra-thin (0.1-0.7 mm) zirconia dental veneers.
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